Product Description
Reseal the top end of your 2003–2005 Ram 5.9L Cummins the right way with the genuine CUMMINS 3954324 OEM VALVE COVER GASKET. This perimeter valve cover gasket restores an OE-tight seal between the valve cover and rocker lever housing, helping stop oil seepage, mess on the block, and dirt buildup around your injectors and wiring. Designed specifically for ISB 5.9 common-rail applications, this Cummins gasket is built to handle real-world heat, vibration, towing, and tuning.
Why Choose the Genuine Cummins 3954324 Gasket?
- OE engineering – Built by Cummins for ISB 5.9 engines, not a generic one-size-fits-all gasket.
- Correct fit & bolt pattern – Matches the factory valve cover and rocker box profile for 2003–2005 Ram 5.9L.
- Long-term seal – Resists heat cycling, crankcase vapors, and vibration in heavy-duty towing or work-truck use.
- Ideal for top-end service – Replace this gasket anytime you pull the valve cover for injector, valve set, or rocker box work.
- Backed by Cummins – Genuine OEM component sourced through CPP Diesel’s Cummins distribution channels.
Fitment
This CUMMINS 3954324 OEM VALVE COVER GASKET is primarily used on 5.9L ISB common-rail engines found in the following applications:
- 2003–2005 Dodge/Ram 2500 – 5.9L Cummins ISB (24-valve, common-rail)
- 2003–2005 Dodge/Ram 3500 – 5.9L Cummins ISB (24-valve, common-rail)
Cummins also uses part number 3954324 in select industrial/ISB/QSB applications. For non-automotive installs or 6.7L ISB/QSB engines, always verify by Engine Serial Number (ESN) before ordering. If you’re unsure, contact CPP Diesel with your VIN or ESN for confirmation.
Best When Paired With These Cummins Top-End Parts
For a complete upper-engine reseal or rocker box service on your 5.9L, pair the 3954324 valve cover gasket with these genuine Cummins components:
- CUMMINS 3963379 OEM ROCKER LEVER COVER GASKET (ROCKER BOX GASKET) – RAM 5.9L/6.7L (2003–2024)
- CUMMINS 3955121 OEM ROCKER LEVER HOUSING (ROCKER BOX) – ISB 5.9L (2003–2005)
- CUMMINS 4995602 OEM ROCKER LEVER ASSEMBLY – RAM 5.9L/6.7L (1998.5–2018)
- CUMMINS 3902343 OEM CYLINDER HEAD ALIGNMENT DOWEL – 5.9L/6.7L CUMMINS (1989–2018)
These Cummins parts are commonly serviced together during cylinder head, rocker box, or valve train work and help keep your top end sealed and aligned to factory spec.
Install Notes
- Clean the valve cover and rocker box sealing surfaces thoroughly—no old rubber, RTV, or oil residue.
- Inspect the valve cover for warpage or cracks; replace if damaged.
- Install the gasket dry unless otherwise specified by Cummins service information.
- Torque the valve cover bolts in the proper sequence and to factory spec.
- After the first heat cycle, visually inspect for any signs of seepage.
Cross-Reference / Alternate Numbers (Reference Only)
The Cummins 3954324 valve cover gasket is commonly cross-referenced to:
- OEM/Mopar: 5086954AA, 65140308AA
- Cummins reference: 3935449 (related upper gasket usage)
- Aftermarket equivalents: Mahle VS50416, various DT/Interstate-McBee kits, and other 5.9L upper valve cover gaskets
Cross-reference numbers are provided for identification only. This listing is for a genuine Cummins 3954324 gasket sourced through CPP Diesel.
Specifications for cummins 3954324
| Attribute | Value |
|---|---|
| Brand | Cummins – Genuine OEM |
| Part Number | 3954324 (Valve Cover Gasket) |
| Engine Compatibility | 2003–2005 Dodge/Ram 2500/3500 – 5.9L Cummins ISB (24-valve, common-rail). Also used on select ISB/QSB industrial and 6.7L applications (verify by ESN). |
| UPC | Not specified by Cummins (N/A) |
| GTIN / EAN | Not specified by Cummins (N/A) |
| Gasket Type | Valve cover perimeter gasket – seals valve cover to rocker lever housing |
| Typical Shipping Weight | Approx. 1.5–2.0 lb packaged (varies by box and packing material) |
| Typical Package Dimensions | Approx. 36 in × 12–30 in × 1–5 in (flat gasket packaging) |
| Cross Reference | OEM/Mopar: 5086954AA, 65140308AA; Related Cummins references: 3935449; Aftermarket equivalents: Mahle VS50416, DTECH DT590006, and other 5.9L valve cover gaskets. |
| E-Codes / Emissions | Not an emissions-calibrated component (mechanical sealing gasket) |
| Country of Origin | Varies by Cummins production batch (contact CPP Diesel if COO is required for your application) |
| Prop 65 Warning | This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. |
FAQ
Will this gasket fit my 2003–2005 Ram 5.9L Cummins?
Yes. Cummins 3954324 is the correct perimeter valve cover gasket for most 2003–2005 Ram 2500/3500 trucks with the 5.9L ISB common-rail engine. If your engine, head, or rocker box has been swapped, verify by ESN before ordering.
Does this include the rocker box (rocker lever cover) gasket?
No. This listing is for the valve cover gasket only. For the rocker box gasket that seals the rocker housing to the cylinder head, use CUMMINS 3963379 .
Do I need RTV or sealant with this Cummins valve cover gasket?
In most cases, Cummins specifies installing this molded gasket dry on clean surfaces. Only use a small amount of approved sealant where OEM service information calls for it (typically corners or joints). Avoid excess RTV, as it can cause leaks or contamination.
Will this work on an ISB/QSB industrial or 6.7L engine?
Cummins does use 3954324 in some ISB/QSB and 6.7L applications, but there are multiple gasket designs across those platforms. For industrial, marine, or non-Ram trucks, always confirm with your engine’s ESN or contact CPP Diesel before ordering.
How can I prevent repeat oil seepage around the valve cover?
Use a new genuine Cummins gasket, clean all mating surfaces, torque the valve cover fasteners in sequence to spec, and inspect the cover for warpage. When servicing the top end, it’s also smart to inspect or replace related components like the rocker box gasket and rocker assembly for a complete, long-term repair.
